Sydney, Dec. 18 -- David Warner will need an injection to play this weekend's Sydney Smash but is "confident" a back issue will not keep him sidelined for a second straight match.

The Sydney Thunder skipper suffered the sort of injury that would make many a mid-30s father wince: the simple act of chasing his kids around on the beach and his back "just went on me".

"Most, or every Saturday morning, we go down to the beach with the kids, and we run around with a lot of the community," the father of three girls, with a former professional ironwoman star wife, told media on Thursday.

"I was just running around with the kids on the sand, and little bit of a twist, and my right lower back just went on me.

"I've got today and tomorrow. I'm con...